Bill Refsland's Devout Chariot had two Nameless Beasts, you know, the phallic lizard things, as the engines for the chariot.
It's all about fun. The Dwarf one has a Dark Tusk Totem pulling it, the SOK and Firstborn have horses, as do the Elves, though I would have made theirs with Dragonbane!!
The pics may have to be moved here for inspiration.